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A kind of preparation method of phenolic compound adsorbent in water

A technology of phenolic compounds and adsorbents, which is applied in the field of preparation of adsorbents, can solve problems such as limited adsorption performance, and achieve the effects of no residual toxic side effects, high adsorption efficiency, and high adsorption capacity

Active Publication Date: 2017-06-06
OCEAN UNIV OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Studies have shown that the adsorption performance of chitosan / montmorillonite intercalation composites on reactive dyes and other organic compounds is significantly improved compared with single chitosan or montmorillonite (Cheng Huali, Li Jin, Wang Han, etc., shell Adsorption thermodynamics of reactive red dyes by glycan / montmorillonite intercalation complex, Journal of Ocean University of China (Natural Science Edition) 2014, 44(6): 90-96. P.Monvisade, P. Siriphannon, Chitosan intercalated montmorillonite : Preparation, characterization and cationic dye adsorption. Applied ClayScience, 2009, 42: 427-431.), but its adsorption performance on hydrophobic organic compounds such as phenolic compounds is very limited (R. Celis, M.A. Adelino, M.C. Hermosín, et al . Montmorillonite - chitosanbionanocomposites as adsorbents of the herbicide clopyralid in aqueous solution and soil / water suspensions. Journal of Hazardous Materials, 2012,209-210: 67-76.)

Method used

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  • A kind of preparation method of phenolic compound adsorbent in water
  • A kind of preparation method of phenolic compound adsorbent in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Disperse montmorillonite (purchased from Zhejiang Sanding Technology Co., Ltd., with a sodium-based ion exchange capacity of 0.9 mmol / g) in distilled water to make a 2% (w / v) suspension, 20 o C under stirring and swelling for 8 h. Under vigorous stirring, slowly add cetyltrimethylammonium bromide aqueous solution with a concentration of 1.0% (w / v) into the montmorillonite suspension, 50 o C constant temperature reaction for 4 h. After the reaction, the product was repeatedly washed with distilled water until the washing liquid was detected by silver nitrate solution without the presence of bromide ions, 50 o C dried to obtain organic montmorillonite. Such as figure 1 As shown, organic montmorillonite (c) at 3627 cm -1 and 1035 cm -1 The absorption peak at is the vibration absorption peak of Al-O-H and Si-O-Si, 2924 cm -1 and 2851 cm-1 The absorption peak at is assigned to -CH 2 and -CH 3 The stretching vibration indicates that the Na-based montmorillonite has ...

Embodiment 2

[0030] Disperse montmorillonite in distilled water to make a 3% (w / v) suspension, 30 o C under stirring and swelling for 6 h. Under vigorous stirring, slowly add cetyltrimethylammonium bromide aqueous solution with a concentration of 1.2% (w / v) into the montmorillonite suspension, 40 o C constant temperature reaction for 8 h. After the reaction, the product was repeatedly washed with distilled water until the washing liquid was detected by silver nitrate solution without the presence of bromide ions, 60 o C dried to obtain organic montmorillonite. The salicylaldehyde condensed chitosan was dissolved in 60% (v / v) acetic acid solution. After fully dissolving, the pH value was adjusted to 3.8 with 2 M NaOH solution. The salicylaldehyde condensed chitosan solution with a molar ratio of 4:1 to the organic montmorillonite substance was slowly added to the fully swollen organic montmorillonite suspension, 50 o The reaction was stirred at C for 48 h. After the reaction, the produ...

Embodiment 3

[0033] Disperse montmorillonite in distilled water to make a 4% (w / v) suspension, 60 o Stir and swell at C for 2 h. Under vigorous stirring, a concentration of 1.5% (w / v) octadecyltrimethylammonium chloride aqueous solution was slowly added to the montmorillonite suspension, 60 o C constant temperature reaction for 4 h. After the reaction, the product was repeatedly washed with distilled water until the washing liquid was detected by silver nitrate solution without the presence of chloride ions, 40 o C dried to obtain organic montmorillonite. Dissolve salicylaldehyde condensed chitosan in 40% (v / v) acetic acid solution, after fully dissolving, adjust the pH value to 4 with 2M NaOH solution. The salicylaldehyde condensed chitosan solution with a molar ratio of 3:1 to the organic montmorillonite substance was slowly added to the fully swollen organic montmorillonite suspension, 40 o The reaction was stirred at C for 48 h. After the reaction, the product was washed repeatedl...

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Abstract

The invention discloses a preparation method of an adsorbent of a phenolic compound in water. Salicylaldehyde condensation chitosan is inserted between slice layers of organic montmorillonite by adopting a solution intercalation method, so as to prepare a salicylaldehyde condensation chitosan / organic montmorillonite intercalated compound. The invention also provides an application and a regeneration method of the salicylaldehyde condensation chitosan / organic montmorillonite intercalated compound used as the adsorbent of the phenolic compound in water. According to the intercalated compound, the advantages of the salicylaldehyde condensation chitosan and organic montmorillonite are coupled; the preparation raw materials are cheap and available; the preparation method is simple; the performance is stable; the adsorbent of the phenolic compound in water has the advantages of high adsorption efficiency, high repeated utilization rate, easiness of regeneration, no residue, no toxic or side effect and the like; and compared with the chitosan / montmorillonite intercalated compound and the chitosan / organic montmorillonite intercalated compound, the adsorbent of the phenolic compound in water has relatively good adsorption capacity and adsorption efficiency.

Description

Technical field [0001] The invention relates to a method for preparing an adsorbent, specifically to a method for preparing a salicylaldehyde-condensed chitosan / organic montmorillonite intercalation composite, and its application as an adsorbent for phenolic compounds in water. Background technique [0002] Phenol is a very important industrial organic compound that is widely used in the production of resins, nylons, antioxidants, pharmaceuticals, insecticides, explosives, dyes and gasoline additives. It enters the production process and the use of products. environment. Phenolic compounds can react chemically with proteins in the cell plasma to form denatured proteins, making cells inactive. Phenol-containing wastewater is listed as one of the key hazardous wastewaters to be solved in my country's water pollution control. [0003] In the treatment of phenolic wastewater, the adsorption method is efficient, fast, easy to operate, and has low energy consumption. It not only...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30B01J20/32C02F1/28
CPCB01J20/24B01J2220/4812C02F1/285C02F2101/345
Inventor 李瑾程华丽梁红波马启敏
Owner OCEAN UNIV OF CHINA
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